meson: allow skipping of run check for IPC_RMID_DEFERRED_RELEASE

The run check is particularly annoying in cross-compile scenarios,
so allow bypassing the check by having the user provide the value
via a cross file or native file:

  [properties]
  ipc_rmid_deferred_release = true

Closes #408

1 files changed, 20 insertions, 5 deletions

diff --git a/meson.build b/meson.build
index b1759b5f3..6d5c7dc89 100644
--- a/meson.build
+++ b/meson.build
@@ -283,13 +283,28 @@ if x11_dep.found() and xext_dep.found()
     ['X11/extensions/shmstr.h', {'extra-headers': extra_headers}],
   ]
   deps += [x11_dep, xext_dep]
-  res = cc.run(files('meson-cc-tests/ipc_rmid_deferred_release.c'),
-    dependencies: [x11_dep, xext_dep],
-    name: 'shmctl IPC_RMID allowes subsequent attaches')
 
-  if res.returncode() == 0
-    conf.set('IPC_RMID_DEFERRED_RELEASE', 1)
+  # Can skip the run check by providing the result in a cross file or
+  # native file as bool property value.
+  prop = meson.get_external_property('ipc_rmid_deferred_release', 'auto')
+  # We don't know the type of prop (bool, string) but need to differentiate
+  # between a set value (bool) or the fallback value (string), so convert to
+  # a string and chec the string value.
+  prop_str = '@0@'.format(prop)
+  if prop_str in ['true', 'false']
+    ipc_rmid_deferred_release = (prop_str == 'true')
+    message('IPC_RMID_DEFERRED_RELEASE:', ipc_rmid_deferred_release)
+  elif prop_str == 'auto'
+    res = cc.run(files('meson-cc-tests/ipc_rmid_deferred_release.c'),
+      dependencies: [x11_dep, xext_dep],
+      name: 'shmctl IPC_RMID allowes subsequent attaches')
+
+    ipc_rmid_deferred_release = (res.returncode() == 0)
+  else
+    error('Unexpected value for external property ipc_rmid_deferred_release: @0@'.format(prop_str))
   endif
+
+  conf.set10('IPC_RMID_DEFERRED_RELEASE', ipc_rmid_deferred_release)
 endif
 
 if feature_conf.get('CAIRO_HAS_XLIB_SURFACE', 0) == 1